Sudoku #x189

Sudoku game, level: Expert #189. This Sudoku have 25 given numbers (clues)..
Structure: 5 (1 pcs.), 4 (2 pcs.), 7 (2 pcs.), 8 (2 pcs.), 1 (3 pcs.), 2 (3 pcs.), 6 (3 pcs.), 3 (4 pcs.), 9 (5 pcs.), ∑25.


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4
9
2
7
8
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6
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6
9
8
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9
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5
7
9
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6
3
2
9
1
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